Here you will find presentations given at COMSOL Conferences around the globe. The presentations explore the innovative research and products designed by your peers using COMSOL Multiphysics. Research topics span a wide array of industries and application areas, including the electrical, mechanical, fluid, and chemical disciplines. Use the Quick Search to find presentations pertaining to your application area.

Acoustic Scattering through a Circular Orifice in Low Mach Number Flow

S. Sack [1], M. Abom [1]
[1] KTH, the Royal Institute of Technology, Stockholm, Sweden

The acoustic scattering through a circular orifice plate in a duct with low Mach number flow (M=0.1) is computed using the Linearized Navier-Stokes physics interface of COMSOL Multiphysics®. The work by Kierkegaard et al. is extended to account for higher order acoustic modes, i.e., behind the cut-on frequency of the first radial duct mode. Orifice flows tend to create a sharp separation zone at ...

Numerical Study of the Self-ignition of Tetrafluoroethylene in a 100-dm3-reactor

F. Ferrero[1], M. Kluge[1], R. Zeps[1], T. Spoormaker[2]
[1]BAM Federal Institute for Materials Research and Testing, Berlin, Germany
[2]Chairman PlasticsEurope Fluoropolymers TFE Safety Task Force, Du Pont De Nemours, Dordrecht, The Netherlands

The self-ignition of tetrafluoroethylene (TFE) caused by contact with hot surfaces has been analyzed with the help of simulations performed with COMSOL Multiphysics®. The current study focuses on large-scale heated reactors for the industrial production of polytetrafluoroethylene (PTFE) from TFE at high pressures. Simulations of the self-heating and consequent self-ignition of TFE in a 100-dm3 ...

Control of Real Distributed Parameter Systems Modeled by COMSOL Multiphysics® Software - new

C. Belavý[1], G. Hulkó[1], S. Lipár[1], B. Barbolyas[1]
[1]Institute of Automation, Measurement and Applied Informatics, Faculty of Mechanical Engineering, Slovak University of Technology in Bratislava, Bratislava, Slovak Republic

In the paper, first a basic concept of the engineering approach for modeling and control of distributed parameter systems (DPS) based on interpretation of controlled systems as lumped input and distributed output systems (LDS) is introduced. Next, FEM modeling of temperature fields in casting mould and extruder body as real DPS by means of the software environment COMSOL Multiphysics® is ...

Multiphysics Process Simulation of the Electromagnetic-Supported Laser Beam Welding

M. Bachmann, V. Avilov, A. Gumenyuk, and M. Rethmeier
BAM Federal Institute for Materials Research and Testing
Berlin, Germany

The article deals with the magnetically-supported high-power full-penetration laser beam welding of aluminum. A stationary simulation was conducted accounting for the effects of natural convection, Marangoni convection and solid-liquid phase transition as well as an electromagnetic volume source term. An ac magnet below the weld specimen induces eddy currents. Consequently, Lorentz forces occur ...

Numerical Simulation of the Lithium-Ion Battery Cell Discharge Characteristics - new

Z. Umar[1], D. Ledwoch[1], L. Komsiyska[1], S. Vasić[[1]
[1]EWE-Forschungszentrum für Energietechnologie e. V, Oldenburg, Germany

In general battery cells are charged/discharged using constant current or constant power expressed as C-Rates and P-Rates respectively. We are developing a single cell-level Li-Ion battery model in order to simulate the performance and the physicochemical phenomena under power discharging mode (P-Rate). The P-Rate is defined as the measure of the rate at which a battery charges/discharges ...

Demonstration of All-Optical NAND Logic Gate Using Photonic Integrated Circuits

J. T. Andrews[1], R. Choubey[1], O P Choudhary[1], N. Malviya[1], A. Patel[1], M. Kumar[1], S. Chouksey[1], J. Solanki[1]
[1]National MEMS Design Center, Department of Applied Physics, Shri G S Institute of Technology & Science, Indore 452003 MP, India

A logic gate performs a certain Boolean logic operation on one or more logical inputs and produces a single logical output. The logic values are either “true” or “false.” Logic gates are bistable devices, that is, they may yield one of these two possible stable outputs. The NAND logic is a universal gate; any logic operation can be performed with various combinations of NAND logics. Many ...

Modeling Thermal Effects of Battery Cells Inside Electric Vehicle Battery Packs

M. R. Khan [1], S. K. Kær [1],
[1] Department of Energy Technology, Aalborg University, Aalborg, Denmark

The poster presents a methodology to account for thermal effects on battery cells to improve the typical thermal performances in a pack through heating calculations generally performed under the operating condition assumption. The aim is to analyze the issues based on battery thermo-physical characteristics and their impact on the electrical state of battery cells(Khan, Mulder et al. 2013, Khan, ...

Model and App of Hydrophobic Meshes Used in Oil Spill Recovery

O. Silva [1], E. Coene [1], J. Molinero [1], B. Shafei [1]
[1] Amphos 21 Consulting S.L., Barcelona, Spain

Hydrophobic meshes are a new, promising technique for the recovery of spilled oil in the ocean. They allow to recover and store oil, while filtering it from the surrounding water. They are clean, efficient and can be used in continuously. These meshes have one drawback, however: if they are submerged too deep under the water level, the high pressure will cause presence of water in the recovered ...

复合材料帽型结构件制造的硅橡胶芯模预制调型孔仿真分析

湛利华 [1], 李自强 [1],
[1] 中南大学机电工程学院,长沙,中国

复合材料帽型加筋结构在航空航天领域得到了广泛应用,硅橡胶芯模是实现其共固化成型的关键工装之一。预浸料固化加热过程中硅橡胶的热膨胀需要通过预制调型孔来消除,以保证帽型加筋结构的成型质量。本文通过 COMSOL Multiphysics® 建立了硅橡胶芯模预制调型孔热力耦合有限元分析模型(图 1),采用传热和结构力学模块对不同结构硅橡胶芯模进行计算机仿真,得出实现复合材料帽型加筋结构形性协同制造的硅橡胶芯模预制调型孔的最佳尺寸范围(图 2)。综合分析硅橡胶芯模受热膨胀的可能影响因素,建立了考虑体积修正系数的预制调型孔计算模型。进一步利用有限元方法回归了芯模预调制型孔体积修正系数,利用回归出的修正系数对不同截面尺寸的帽型结构进行仿真验证,从而确定了较准确地预制调型孔的理论计算模型(图 3)。最后,通过实验验证了该数学模型及有限元分析方法的正确性,为制造复合材料帽型加筋结构提供了理论与实验依据 ...

Understanding the Magnetic Field Penetration in Mesoscopic Superconductors via COMSOL Multiphysics® Software - new

I. G. de Oliveira[1]
[1]Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, Brazil

Introduction: One of the main characteristic of the superconductors is its diamagnetic response of applied magnetic fields. The superconductors refuse the penetration of magnetic field into its interior, it is the well know Meissner effect, B=0 into the superconductor sample. However when the applied field reach a determined value, the magnetic field can enter. There are two different ways of ...